Car washing pump



May 2; 1933- E. A. HoBAR-r 1,907,110

CAR WASHING PUMP EDWARD A HoBART,

A TTORNE Y6 May 2, 1933. E. A. HOBART 1,907,110

GAR WASHING PUMP Filed Deo. 2Q, 1930 9 Sheets-Sheet 2 o W76" l L L 1 JNVENTOR EDWARD AHOBART,

A TTORNE YS E. A. HOBART CAR WASHING PUMP May 2, 1933.

Filed Dec. 20, 1930 9 Sheets-Sheet 3 ,Twaram/ EDWHRDAHOBHRY; WM 7M @Lun/fran,

May 2, 1933.

9 sheets-sheet 4 Filed Dec. 20, 1930 @www Maly 2, 1933. E. A. HoBAR-r Q'H@ CAR WASHING PUMP Filed Dec. 2o, 1930 9 Sheets-sheet 5 Mmmm E. A. HGBART CAR WASHING PUMP May 2, M933,

9 Sheeas-Sheet 6 Filed Dec E mm H l K ---l In w 1 MQ .mv www, n QW @vgl :Sil 1i if f W Tm E. A. HOBART May 2, 1933.

E. A. HOBART GAR WASHING PUMP May 2, 1933.

Filed Deo.. 2o, 195o '9 sheets-sheet 9 www Patented May 2, 1933 uNiTEu STATES PATENT OFFICE 15. EDWARD A. HOBART, 0F TROY, OHIO, ASSIGNOR TO THE HOBART BROS. COMPANY, OF

TROY, OHIO, A CORPORATION F OHIO I GAB VWASHING PUMP My invention relates to pumps and in particular to pumps for washing-apparatus from which a spray is directed.

It is an object of my invention to provide a very compact apparatus with the motor driving appara-tus in a position where it is thoroughly drained and freek from coming in contact with the water being pumped.

It is a further object to provide a unitary driving unit of motor gearing and piston rod separately assembled and detachable from the pumping unit.

It is a further obj ect to provide a pumping unit'having a low .pressure mechanism and a high pressure mechanism with low pressure and high pressure chambers.

It is my object to provide a regulator and check valve mechanism .for regulating the pressure of delivery of the Huid. n

It is a further object to provide a unitary cylinder inlet and outlet passageway and piston rod support.

Referring to the drawings, Figure 1 is' al vertical section through the motor, motor driven mechanism for reciprocating the piston rod, the double acting cylinder, piston, regulator and check valve.

Figure 2 is an end elevation with the valve casing partially in section showing one of the inlet and one of the outlet valves.

Figure 3 is a top plan vview of the cylinder casting having inlet and outlet passageways.

Figure 4 is a detail bottom plan view of the detachable valve chamber.

Figure 5 is a section on the line 5-5 of Figure 6 showing the arrangement of the check valve and the relief valve.

Figure 6 is a section on the line 6 6 of Figure 5 showing the same mechanism.

Figure 7 is a section on the line 7 7 of Figure l.

Figure 8 is a section on the line 88 of Figure '7.

F igure 9 is a section through the drain,

,air chamber and inlet to the air chamber on the low pressure inlet side.

Figure 10 is a detail section through the drain and screen on the inlet side.

Figure 11 is a section through the high pressure air chamber and the inlet thereto.l

Figure 12 is a top plan view of the valve chamber. f

Figure 13 is a section on` the line 13-13 of Figure 7.

Figure 14 is a section on of Figure 12.

.the line 1414 Referring to the drawings in detail, 1 is a base having bolt receiving holes 2 for attaching the base to any foundation or standard that may be desired. On this base is mounted the crank case 2 having a detachable end plate 3. Mounted on the crank case is the bearing plate 4 carrying the bearing 5.v The base 1 also carries a bearing 6V in the bearing cup 7 which takes the thrust on the worm shaft 8. The worm shaft 8 carries the worm 9 that engages the worm wheel 10 on the shaft 11. Under this worm is mounted a counter balance weight 12.- On the shaft 11 is mounted vthe eccentric 13, lthe eccentric strapV 14 and the pitman 15 whichis connected to the cross-head 16 guided within the cylindrical sleeve 17 that is detachably connectedby the bolts 18 to thecrank case 2. The cross-head 16 is connected to the pis-V ton rod 19.

The motor housing 2O is detachably mounted on the crank case 2 by the bolts 21. The armature shaft 22 of the motor 23 is connected tothe worm shaft 8 by the coupling 24. On the `armature shaft is provided va fan 25 which serves to discharge air through the'vent openings 26. The upper end ofthe armature shaft is aligned by the ball-bearing 2 j By this arrangement the Worm and worm gear, eccentric and eccentric strap, andthe cross-head bearing and its guide can be lubricated. from the lubricant contained in the crank case, which also lubricates the thrust bearing 6 and the bearing 5. All working bearings are therefore taken care of from a common source of lubricant. The motor is mounted above the` lubricant where it cannot be splashed, and as will be hereinafter pointed out, it is mounted above the water. The motor is further dried by the fan cir-l culating the air through the motor housing 20 and vent opening 26. The armature shaftis suitably supported on proper bearings as 27 but the lubrication of those bearings does not interfere with the operation of the motor. The motor may be completely removed without disturbing the mechanism that it drives. The pumping vmechanism may be assembled or disassembled with respect to the driving mechanism in the crank case without disturbing the driving mechanism or'disturbing the motor.

Pumping apparatus fundamental supporting frame is shown 1n Figure 3. which carries the cross-head sleeve 17 and is utilized to support the pumping apparatus through the bolts 18 on the crank case 2'. This end plate is providedwith a pair of arms 29 and 30 which have integral with their eXtreme ends a casing or housing having therein a cylinder and inlet and outlet chambers 31 and 32 and the cylinder 33 therebetween. Attached to the arm 29 is the strainer generally designated 34 through which the incoming water Hows into the passageway 35, thence through the hollow portion 36 of the arm 29 into the chamber 31. It Amakes its exit vfrom the chamber 31 through the upper portion of oblong shape 37 into the inlet valve chamber. This inlet valvechamber is within the casting known as the valve chamber casing. The inlet valve chamber 38 is separated by the partition 48a from the outlet valve chamber 48. The water then passes through the valves 41 in the inlet valve chamber, which open downwardly againstk the spring 42 into the inlet pump chamber 43, into which chamber it is moved by the suction of the piston 44; upon the return stroke of this piston 44- the fluid is forced out of the chamber 45, whichy is the outlet pump chamber, beneath the outlet valves 46 against the springs 47 into the outletvalve chamber 48, from which chamber the fluid passes through the port 49 into the passageway 50 of the regulator housing 51 into the check valve chamber 52 beneath the check valve 53 held in position by the spring 54. The forward inlet and outlet pump chambers 43 and 45 beneath the respective valves 41 and 46 are separated from similar chambers under similar valves by the partition 43a which is arranged transversely of the cylinder. he fluid proceeds from chamber4 52vinto the chamber 55 formed by an extension V40 on the housing 51, through the passageway 56, downwardly through the passageway 57, through. the port 58 into the,

pasageway59 into the chamber 60 and thence through the slot 61-in the bottom of the valve chamber casing and thence through the slot 62 in the top of the cylinder casing, through the outlet pasageway 63 on the arm 30 of the cylinder casting and thencethrough the voutlet fitting 64. The foregoing is the path It consists VofV all end plat@ 28. the passageway 65 communicates.

merely unscrewing the valve cage from its partition support.

In the eventofgabnormal pressure, the high pressure in the branch passageway 65 which communicates with the outgoing high pres-- Turning to the pumping apparatus, the

sure fluid :will engage the rubber diaphragm 66 which closes ofll the port 67 with which Mounted on thisdiaphragm 66 is the head 68 of a diaphragm 'plunger 69which is guided bythe cage 10 that is threaded at 71Y in the regulator housing 51. This cage is provided withv fingers 72for retaining a regulator valve ball 73 in position where the bottom of the ball can be engaged by the plunger 69 for elevatingV the ball against the resistance of a spring 74 which resists the upper movement of the ball 73 through the ball aligning plate 75.

The elevating of the ball permits the fluid to pass under excessively high pressure from the chamber 52 into the chamber 76, under the ball 73 through the cage 70 into the passageway 77 and through the port 78 back tov the low pressure or inlet valve chamber 38.

The chamber 76 is closed by means of a cap 76 which forms an abutment for one end of the spring 74. lhen this cap 76 is removed the valve cagef70 lmay beremoved from its position, as shown in Figure 6. There is a screw 76" in the upper end ofthe cap 76 for .controlling the tension of the spring 7 4.

The low pressure air chamber 79 is mounted on tl lt Varm 29 in communication with the inlet passageway 36. The highY pressure chamber 8O is in communication with the passageway 63 as indicated. g

The purpose of the check valve 53 is to retain the high pressure'air in the high pressure air chamber 80 when the hose connected to the outlet of the pump is shut off, thereby preventing rapid vibrations of the diaphragm 66. Furthermore, by using the check valve 53, the high pressure air is retained in the high pressure air chamber and the ball valve 73 Vcan remain open without being disturbed by a reduction of pressure due to the release of that air, thereby allowing water to con* tinue to b'ereturned under the ball to the low pressure side. Of course, when the nozzle of the hose connected to the outlet lis open, there is no need for by-passing the water back to the low pressure side, as the water, and a part of the air in the high pressure air chamber will be relieved through the hose, thus reducing the pressure to normal. By abnormal condition of the water it is meant that condition where excessive pressure exists when the hose is shut oif and the pump is still operating and-it isfdesired to by-pass the water from the high pressure side back to the low pressure side without cutting off the pump.

On the low pressure cylinder is an air admittance valve 79a which can be opened when desired to allow air to be drawn'in to charge the system with air in order to provide an air cushion in the system.

I desire to comprehend within my invention such modifications as may be clearly embraced within my claims and the scope of my invention.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. In combination, a cylinder casting comprising a supporting` end plate, a pair of supporting arms having respectively an inlet passageway and an outlet passageway therein, an inlet water chamber and an outlet water chamber formed on the end of said arms, and a cylinder supported therebetween.

2. In combination, a cylinder casting comprising a supporting end plate, a pair of sup porting arms having` respectively an inlet passageway and an outlet passageway therein, an inlet water chamber and an outlet water chamber formed on the end of said arms, a cylinder supported therebetween, and a cross.- head guide mounted on the opposite face of said supporting end plate whereby a piston rod may be aligned and guided in the crosshead guide and in said cylinder.

3. In combination, a cylinder castingcomprising a supporting end plate, a pair of supporting arms having respectively an inlet passageway and an outlet passageway therein,

an inlet water chamber and an outlet water chamber formed on the end of said arms, a cylinder supported therebetween, a low pressure air chamber mounted on one of said arms and a high pressure air chamber mounter on the other of said arms, said chambers being in communication with the respective inlet and outlet passageways on the arms.

4. In combination, la cylinder, a piston and piston rod reciprocating therein, a casing surrounding said cylinder and communicating with the open ends thereof, a. partition transversely arranged of said casing providing a front inlet and outlet pump chamber and a rear inlet and out-let pump chamber, inlet and outlet valves in each of the front and rear pairs of chambers, an inlet'valve chamber communicating with the inlet valves of the front and rear pair of valves, an outlet valve chamber communicating with the other of the front and rear valves, an outlet line from the outlet chamber on the high pressure side Vof the pump, and a. check valve therein.

5. In combination, a cylinder, a piston and piston rod reciprocating therein, a casing surrounding said cylinder and communicating with the open ends thereof, a partition transversely arranged of said casing providing a front inlet and outlet pump chamber and a rear inlet and outlet pump chamber, inlet and o-utlet valves in each of the front and rear pairs of chambers, an inlet valve chamber communicating with the inlet valves of the J'ro-nt'and rear pair of valves, an outlet valve chamber communicating with the other of the front and rear valves, an outlet line from the outlet chamber on the high pressure side of the pump, a check valve therein, and a regulator valve associated with said outlet side whereby when excess pressure occurs on the outlet side, high pressure fluid Will be bypassed back to the low pressure inlet valve chamber.

In testimony whereof I aix my signature.

EDWARD A. HOBART. 

